On 7/21/2011 12:57 PM, Pol Hallen wrote: > dd if=/dev/zero of=/dev/md0 bs=1024M count=10 > 10+0 records in > 10+0 records out > 10737418240 bytes (11 GB) copied, 166.042 s, 64.7 MB/s Do you not recall that I explained in detail, not two days ago, why you should not use a 1GB block size when testing with dd in this manner? And don't do this with the raw device. The resulting numbers, no matter how large or small, are irrelevant. *Put a filesystem on md0* and do: ~$ dd if=/dev/zero of=/some/dir/test.dd bs=4096 count=2621440 And why on earth would you bother running this test while the array is still building? Again, the resulting figure is worthless to everyone. -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html